/Engine/Source/Runtime/Slate/Public/Framework/Docking/TabManager.h
void InsertDocumentTab ( [FName](API\Runtime\Core\UObject\FName) PlaceholderId, [FName](API\Runtime\Core\UObject\FName) NewTabId, const [FSearchPreference](API\Runtime\Slate\Framework\Docking\FTabManager\FSearchPreference) & SearchPreference, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SDockTab](API\Runtime\Slate\Widgets\Docking\SDockTab) > & UnmanagedTab, bool bPlaySpawnAnim )